1. Mix the courgettes, pepper, capers and parsley in a salad bowl.
2. In another smaller bowl mix the linseed oil, lemon juice and mustard and thoroughly mix.
3. Add freshly ground black pepper and mix again.
4. Pour the dressing over the courgette mixture and mix the vegetables carefully.
5. Prepare a bed of red lettuce leaves on 4 separate plates.
6. Place the courgette mixture on top of the lettuce leaves and serve up! Enjoy!